6-Hourly NCEP/NCAR Reanalysis Data Composites

Plot maps or composites of variables from the NCEP/NCAR Reanalysis dataset. Data is available from Jan 1948 to Nov 18, 2024 for most variables. Some variables are not updated as frequently.

Variables Analysis level?
Enter Year, Month and Day and Hour(0,6,12,18z) for composites
For example, 1999 1 1 18 (Don't type in the z). To subtract one set of days from another, use a minus sign (-) before the years of the days that are to be subtracted. Default is last available date for variable.
           
           
       
       
       
           
   
OR to Enter Year of last day of range
OR File with Dates Optional Plot Label replaces list of dates.
Filename: Plot Label:
Hours to add or subtract:
This number of days will be added (or subtracted) from all input dates. Please use all positive dates for input.
Color? Shading Type
Plot type? MeanAnomaly
Scale Plot Size(%) Plot contour labels?No Yes
Vector Winds: Plot every nth arrow in x and y (default 2)
Override default contour interval ? Interval: Range: lowhigh Scale vectors
Region of globe
If CUSTOM:
Enter lowest lat (-90 to 90) Highest lat
Enter western most longitude (0 to 360) Eastern most longitude
Choose projection for CUSTOM:
Choose height range for CROSSECTION: to

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This is a Research and Development Application